Double-click on the movie to PLAY.
Click once to PAUSE.
Double-click again to return to the START of the movie.
M2
The square is the largest quadrilateral inside a circle. So one might argue that therefore half a square is the largest triangle. (This is what I thought initially.)
As before, moving point A slightly (left), might appear to confirm this: the height from A decreases, so A is a local maximum.
But what if we move B and/or C ? We consider this NEXT.